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mybatis sql in 查询

1. 当查询的参数只有一个时 
  findByIds(List<Long> ids)
 1.1 如果参数的类型是List, 则在使用时,collection属性要必须指定为 list

<select id="findByIdsMap" resultMap="BaseResultMap">    Select      <include refid="Base_Column_List" />    from jria where ID in      <foreach item="item" index="index" collection="list" open="(" separator="," close=")">    #{item}      </foreach>  </select>  

findByIds(Long[] ids)
 1.2 如果参数的类型是Array,则在使用时,collection属性要必须指定为 array

<select id="findByIdsMap" resultMap="BaseResultMap">    select      <include refid="Base_Column_List" />    from tabs where ID in      <foreach item="item" index="index" collection="array" open="(" separator="," close=")">    #{item}      </foreach>  </select> 

2. 当查询的参数有多个时,例如 findByIds(String name, Long[] ids)
 这种情况需要特别注意,在传参数时,一定要改用Map方式, 这样在collection属性可以指定名称
         下面是一个示例
         Map<String, Object> params = new HashMap<String, Object>(2);
         params.put("name", name);
         params.put("ids", ids);
        mapper.findByIdsMap(params);

<select id="findByIdsMap" resultMap="BaseResultMap">    select      <include refid="Base_Column_List" />    from tabs where ID in      <foreach item="item" index="index" collection="ids" open="(" separator="," close=")">    #{item}      </foreach>  </select>  

 

mybatis sql in 查询